UT3 Pro Magnetic Rechargeable Hand Warmer - Black/BlackDESCRIPTION The UT3 Pro Hand Warmers offer a curved heating surface for better skin contact and efficient heat distribution. With an easy to grip design and double sided heating with four levels of heat up to 58 degrees making them an ideal companion for daily activities and adventures. Upon snapping, the external side continues to heat while the internal heating is paused to ensure safety and energy efficiency. When separated, both sides activate